"My Favorite Museum Exhibit" is a series of posts aimed at giving BoingBoing readers a chance to show off their favorite exhibits and specimens, preferably from museums that might go overlooked in the tourism pantheon. I'll be featuring posts in this series all week. Want to see them all? Check out the archive post. I'll update the full list there every morning.
Tom Ruginis took this photo in a men's restroom at the Science Museum Oklahoma. I spent an inordinate amount of time at this museum as a preteen, back when it was called the Omniplex (it shares a complex with an air and space museum, botanical gardens, a photography museum, and for some reason I was never able to fully understand ... a gymnastics hall of fame).
In case you can't read the sign, it says, "During your lifetime, you will make approximately 10,000 gallons of urine."
Maggie Koerth-Baker is the science editor at BoingBoing.net. She writes a monthly column for The New York Times Magazine and is the author of Before the Lights Go Out, a book about electricity, infrastructure, and the future of energy. You can find Maggie on Twitter and Facebook.